萃取残渣

Chernobyl Disaster Leads to Advances in Science, Medicine The accident at the Chernobyl nuclear plant did much more than change the lives of hundred thousands of affected people. It also contributed greatly to Western science. Physicists and medical

发表于:2019-01-14 / 阅读(38) / 评论(0) 分类 VOA标准英语2011年(四月)

Have you ever considered the possibility that the sun will eventually burn out? Don and Yael discuss that sobering thought on this Moment of Science. [OUTSIDE INSECT SOUNDS] D: Wow, what a beautiful s

发表于:2019-01-26 / 阅读(97) / 评论(0) 分类 阅读空间

今天我们要学的词是hard-core。 Hard-core, 是指坚定的,铁杆的。Hard-core gamers, 是指打电玩上瘾的人。Hard-core members of the party, 是指一个政党的中坚力量。All my friends are hard-core Redskin fans, 我的朋友

发表于:2019-02-08 / 阅读(90) / 评论(0) 分类 英语单词荟萃

Let us cut an apple across so as to divide it into halves. Now we can see the five parts of the seed-vessel in the middle of the fruit, and we notice that each of these parts contains at least one black seed. These seeds are held in a tough skin, whi

发表于:2019-02-13 / 阅读(37) / 评论(0) 分类 英国学生科学读本

【英文原文】 Like all stars, the sun is basically a giant nuclear reactor that burns hydrogen to create energy. But like any reactor, the sun needs fuel to keep going. Its been going strong for around four-point-five billion years, and will pro

发表于:2019-02-16 / 阅读(148) / 评论(0) 分类 英语听力广播—Listening

So Long, Sun 再见了,太阳 D: Wow! What a beautiful sunset. Y: Enjoy it while it lasts, the sun wont be around forever, you know. D: You mean, one day the sun will disappear? Y: Not exactly disappear, but the sun will eventually burn out and die

发表于:2019-02-16 / 阅读(45) / 评论(0) 分类 英语听力文摘 English Digest